1  /* Get file-specific information about descriptor FD.  Linux version.
       2     Copyright (C) 1991-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <fcntl.h>
      20  #include "pathconf.h"
      21  
      22  static long int posix_fpathconf (int fd, int name);
      23  
      24  /* Define this first, so it can be inlined.  */
      25  #define __fpathconf static posix_fpathconf
      26  #include <sysdeps/posix/fpathconf.c>
      27  
      28  
      29  /* Get file-specific information about descriptor FD.  */
      30  long int
      31  __fpathconf (int fd, int name)
      32  {
      33    struct statfs fsbuf;
      34  
      35    switch (name)
      36      {
      37      case _PC_LINK_MAX:
      38        return __statfs_link_max (__fstatfs (fd, &fsbuf), &fsbuf, NULL, fd);
      39  
      40      case _PC_FILESIZEBITS:
      41        return __statfs_filesize_max (__fstatfs (fd, &fsbuf), &fsbuf);
      42  
      43      case _PC_2_SYMLINKS:
      44        return __statfs_symlinks (__fstatfs (fd, &fsbuf), &fsbuf);
      45  
      46      case _PC_CHOWN_RESTRICTED:
      47        return __statfs_chown_restricted (__fstatfs (fd, &fsbuf), &fsbuf);
      48  
      49      default:
      50        return posix_fpathconf (fd, name);
      51      }
      52  }